Liss Expert Professional Stem Cells Smoothing Treatment — 250 ml (Shoulder-Length) Formaldehyde‑Free Keratin & Argan Oil for Frizz

Liss Expert Stem Cells Smoothing Treatment is a professional-grade, formaldehyde-free keratin system that smooths frizz, restores shine and delivers salon-style straightness for up to 12 weeks when sealed with a flat iron.

Designed for at-home use by people who want long-lasting smoothness without harsh chemicals, this 250 ml formula blends keratin, argan oil, collagen and plant-derived stem cell actives to hydrate, repair and improve manageability. The concentrated cream is sized to treat shoulder-length hair and follows a three-step application protocol to ensure even coverage and optimal sealing. Because the treatment relies on heat sealing, results depend on following the included instructions and using a titanium flat iron for best durability.

How does this treatment reduce frizz and add shine?

The formula replenishes lost protein with keratin while argan oil and collagen smooth the cuticle and reflect light for visible gloss. Plant stem cell actives support follicle health and the product’s emollients deliver immediate slip and softness. When heat-sealed, the treated hair maintains a sleeker surface that resists humidity.

• Keratin rebuilds internal hair structure and reduces surface roughness.
• Argan oil and collagen restore shine and tactile smoothness.
• Heat sealing with a flat iron locks the formula into the hair fiber for long-lasting control.

Is this safe for colored, chemically treated, or fragile hair?

The system is formaldehyde-free and formulated to be compatible with color-treated and chemically processed hair, but results vary with prior treatments and hair porosity. A strand test is recommended to confirm tolerance and desired effect before treating the whole head. For fragile hair, follow timing guidance precisely and avoid overlapping previously treated sections.

• Suitable for colored and chemically treated hair when used according to instructions.
• Perform a strand test to check compatibility and timing.
• Avoid repeated overlapping on heavily damaged sections to prevent over-processing.

What is the application process and how long do results last?

Application follows three clear steps: cleanse, apply the keratin cream, then flat-iron small sections to seal. The included guide explains timing and sectioning; consistent heat from a quality titanium flat iron is essential for durability. With correct technique, expect salon-quality smoothness that can last up to 12 weeks, depending on hair type and aftercare.

• Three-step protocol: shampoo, apply treatment, and seal with a flat iron.
• Titanium flat iron recommended for even heat and reliable sealing.
• Results last up to 12 weeks; individual longevity depends on hair porosity and maintenance.

How should I care for my hair after treatment?

After sealing, use sulfate-free shampoos and limit salt- or chlorine-heavy exposures to extend the effect. Gentle styling and regular conditioning will help preserve smoothness and shine. Touch-up treatments can be applied as hair grows out or when frizz begins to return.

• Choose sulfate-free cleansers to protect the keratin layer.
• Minimize frequent high-heat styling to reduce cumulative stress.
• Schedule touch-ups as needed based on regrowth and texture changes.

Who this product is for: Liss Expert Stem Cells Smoothing Treatment is aimed at people with wavy, curly, frizzy or chemically treated hair who want a salon-grade straighten-and-smooth solution at home without formaldehyde. It suits shoulder-length to longer hair (250 ml recommended for shoulder length) and is best for users comfortable following step-by-step heat-seal instructions and owning or renting a quality titanium flat iron. If you’re seeking reduced styling time, improved manageability and enhanced shine with professional results, this treatment provides a concentrated, conscious-care option that prioritizes smoothness and hair feel.

Ingredients

Collagen